<!DOCTYPE html>
<html lang="en">
<head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>Document</title>
</head>
<body>

      <form action="./03_getmsg.php">
            <p><input type="text" name="username"></p>
            <p><input type="text" name="wechat"></p>
            <button>提交</button>
      </form>

      <script>
            // 核心目标 : 在前端填写数据 , 发送到后端php由php接收;
            // form 进行数据提交;
      </script>
</body>
</html>